Spark-plug



SPARK PLUG.

APPLICATHJN mm mm 3|. m9.

Patented Miir. 53,1920.

the rotatable terminal being UNITED STATES JOSEPH IACON 0,013 YORK, N Y.

SPARKJPLUG.

Anpli'cation filed July 31,

To all whom it may concern:

Be it known that I, JOSEPH IACONO, a subject of Italy, (who has declared his intention of becoming a citizen of the United States',) residing at the city of New York, borough of Manhattan, State of New York, have invented a certain new and useful Spark-Plug, of which the following is a specification.

This invention is a spark plug for use in engines of the internal combustion type, and it is directed more particularly to improving the device disclosed granted to me June 17, 1919, No. 1,306,817.

In the device of my prior patent, the body of the plug is slotted for the reception of a rotatable terminal. In one pal-tot the present invention I seek to simplify the construction ,and to secure economy in the manufacture by omitting. the slot in the plug. and to these ends I resort to the use of a hanger for the rotatable terminal, whereby said hanger may easily be attached to the body of the plug 'for. mounting the rotatable terminal into cooperative relation to the fixed terminal.

Another part of the invention consists in a. novel form or construction of the rotatable terminal, the body of which is provided with radial shoulders on the respective faces or sides, andthe outer edge of whiclris formed with aseries of abutments positioned tangentially to the otherwise circular (peripheral edge of said rotatable terminal.

- Other features and advantages of the invention will appear from the following de scription taken in connection with the drawings, wherein Figure l is aslde elevation of line 22 of Fig. 1, looking in the direction of the arrow.

Fig. 3 .is a detached view of the rotatable. terminal, the same being an edge elevation viewed in the direction of the arrow 3 in Fig. 1, and

Fig. 4 is a detached view of one form of the hanger composed of complemental parts. shown in dotted lines. 1

The body, A, of the plug externally threaded, at a, for attachment to tho cyl inder or other fixed part of the engine, said Specification of Letters Patent.

in a prior patent a spark plug constructed in accordance with my- Patented Mar. 23, 1920. 1919 Seria1,N0..314,429

present invention, the body A is free lrom the slot employed in the device of myprior patent for the recap-- As shown 2, the inner end portion of the plug tion of the rotatable terminal.

in Fig. body chambered at b in order to receive the corresponding end portion of the fixed terminal C, and in thewall of said chambered portion the plug-body is provided with openings, 0, the latter being drilled or bored to a suitable deptln'said openings 0 being parallel to the longitudinal axial line of the phig-body I) is a hanger tor-mounting the rotatable terminal E in a position below the chembered end 0 of the body and in cooperative relation to the fixed terminal C. As shown, the hanger is composed of a single piece'of suitable material, such as wire,-and the same is bent. or otherwise formed, to produce a journal (I. the attaching arms, d, and a shank. c. The wire composing the hanger is first bent at-two points to form the members constituting the shank e and .the part which acts as the journal (Z, after which the wire is again bent so as to form the arms cl, the latte being spaced apart a distance greater than the length of the journal and said arms being parallel. Prior to attaching the hanger to the plug-body, the rotatable terminal E is positioned on the journal (I, after which the arms (5 of said hanger are thrustinto the openings 0 of the plug-body, suitable means being employed for fixedly attaching said arms (Z' to the body A, whereby the hanger occupies a permanent relation to the spark plug. As shown in Fig. 2, the hanger is bent from, or composed ot', a; singlipiece of wire, but for conveniently assembling and attaching the rotatable terminal, I may and preferably do, resort to the construction of hanger shown in F 4, wherein.

I have illustrated said hanger as composet -ot complemental parts D. I) so beat that the meeting ends of the wires constitute the journal (I for the rotatable terminal.

The rotatable terminal or electrode, is a single piece of iron, steel, or other current formation, at it,

rod C which con-- lOO carrying metal: in form, it is approximately a disk, and at the center it is provided with an opening and flanged to produce a hub 7,

at a number of places, as indicated at g, in

Fig. 1, said peripheral edge of the said member being bounded by lines h, a, whereof the lines h are tangents to the otherwise circular outline of the approximately disk shaped member. On the side (lateral) faces "of the disk, it is formed with ribs or shoulders j, the latter extending radially to the hub f and extending, also, past the tangential edges it so as to meet with the edges 71,

thereby producing a succession of abutments 1c, the latter being positioned to extend inwardly from 'the periphery of the disk shaped electrode. The radial shoulders and the peripheraP-abutmentspresent surfaces for the action of the gases flowing within the engine cylinder, so that the flow of the gases W1 1 impart the desired rotary movement to the electrode E. The abutm'ents at the periphery of the rotatable terminal are adapted to travel in a path close to the extremity of the fixed terminal 0, and to produce therewith a succession of spark gaps across which the current is compelled to jump and thereby produce a succession of sparks, the

intenslty of which is augmented by the rotation of the abutments with respect to the fitted position of the electrode C. 1

It is thought that the operation of the device, and the advantages thereof, will be understood from the foregoing description taken in connection with the drawings.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is i 1. A spark plug comprising a body menu her, a fixed electrode therein, a hanger composed of complemental parts attached to the body member and positioned for the meeting ends of said parts to constitute a journal, and a rotatable electrode mounted loosely on. the journal and supported by the hanger in cooperative relation to the fixed acctrode.

2. In a spark plug, a r w tatable terminal or electrode provided with. radial shoulders and haviiv a notched )eri iiiior so "formed. as to present a series of ahutments In a spark plug, a .-.'otatal provided upon its respective c radial shoulders, the edge pint-ion o electrode being formed with notched extend ing inwardly and meeting with said radial shoulders and forming therewith succession of abutmenta 1. In a spark plug, rotatable (lQCt-MKlG the edge portion of: which is provichad with a series of notclws and the respective sides of which are provided with ribs 1 i shoulders so Related to the notchcs'as to produce there'- with a succession of abutment-s upon the peripheral portion of said electrode.

In testimony that I claim he fol my invention I have signed my 11- at the city of New York this 12. July, 1919.

Going as an hereto 

